package com.sky.service.impl;

import ch.qos.logback.core.status.Status;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.beans.Transient;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增菜品和口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
//向菜品表中插入数据

        //向口味表中插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            //向口味表中插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page= dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否能被删除---是否存在起售中的菜品
for (Long id: ids){
    Dish dish = dishMapper.getById(id);
    if (dish.getStatus() == StatusConstant.ENABLE){
        //存在起售中的菜品
        throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
    }
}

        //判断菜品是否能被删除---是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
if (setmealIds != null && setmealIds.size() > 0){
    throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
}
        //删除菜品表中的数据
//for (Long id:ids){
//    dishMapper.deleteById(id);
//        //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//    }

        //批量删除菜品表中的数据
        dishMapper.deleteByIds(ids);
/**
 * 批量删除菜品关联的口味数据
 */
dishFlavorMapper.deleteByDishIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查询口味数据
    List<DishFlavor> dishFlavors=  dishFlavorMapper.getByDishId(id);

        //组合对象返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//修改菜品表数据
dishMapper.update(dish);

        //删除口味表数据
        List<Long> flavorList=new ArrayList<>();
        flavorList.add(dishDTO.getId());
        dishFlavorMapper.deleteByDishIds(flavorList);
        //重新插入口味表数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            //向口味表中插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /**
     * 菜品起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish =new Dish();
        dish.setId(id);
        dish.setStatus(status);
        //修改菜品状态
        dishMapper.update(dish);
        // 如果是停售操作，还需要将包含当前菜品的套餐也停售
        if (status == StatusConstant.DISABLE){
            List<Long> dishIds = new ArrayList<>();// 将当前菜品的id添加到集合中
            dishIds.add(id);
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(dishIds);// 通过菜品id查询包含当前菜品的套餐id
            if (setmealIds != null && setmealIds.size() > 0){
                // 停售套餐
                for (Long setmealId:setmealIds){
                    Setmeal setmeal = new Setmeal();
                setmeal.setId(setmealId);
                setmeal.setStatus(StatusConstant.DISABLE);
                    setmealMapper.update(setmeal);
            }}

        }
    }
    /**
     *根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish=new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        return  dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
